It’s not the Story Group’s job to put their foot down over anything that’s open to discussion, but rather to be positive and work with everyone to the best overall effect. They knew Star Wars had seen its share of phenomena like the hyperspace transmission of light or whatever; they knew the TFA novelization wasn’t supposed to be canon where it contradicted the film, and the Rey/Poe meeting had been omitted; they knew that Maul was available. That’s not the same as George Lucas saying that the established Korriban didn’t work for him as the name of the Sith planet, and that it was going to be Moraband from The Clone Wars forward. The new contributors wouldn’t knock down the basics because the property isn’t theirs to begin with.